Cusco 420475A Type I Front Lower Arm Bar Chassis Brace

The Cusco 420475A Type I Front Lower Arm Bar is a high-performance chassis bracing component engineered to reduce front suspension flex and improve overall handling dynamics. Constructed from high-tension tubular aluminum with a blue anodized finish and anti-corrosive coating, this brace delivers meaningful rigidity gains with minimal weight penalty.

Unlike conventional strut tower braces that work at the top of the suspension, lower arm bars are unique in that they work directly at the mechanical pivot points of the suspension. By bridging the front lower arm mount locations, this brace minimizes unwanted movement at the control arm-to-subframe interface — one of the primary sources of chassis flex during aggressive cornering, braking, and acceleration.

Key Features:

• Two-point lower arm connection — links the front lower arm mounts to reduce chassis flex and alignment shift under load
• High-tension tubular aluminum construction — lightweight and corrosion-resistant with a blue anodized finish
• Improves steering rigidity and throttle response — reduces the vagueness introduced by subframe and lower arm flex
• Bolt-on installation — uses existing mounting points with no drilling or permanent modification required
• Includes all required hardware — installs with standard hand tools
• Compatible with other Cusco chassis bracing — designed to work alongside Cusco strut bars and other braces for a comprehensive rigidity upgrade

Cusco (a division of Carrosser Co., Ltd.) is a Japan-based performance engineering company with an extensive motorsport background spanning rally, track racing, autocross, and gymkhana. Their chassis bracing lineup is manufactured in-house to ISO 9001-certified quality standards, ensuring consistent fit and performance across every application.